Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 7/21/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 07/22/2025 | 14:28:58 | 70.09, -40.92 | 49.95 | 07/22/2025 | 14:29:25 | 70.07, -40.95 | 49.91 | 3.41 | 27 |
| 2 | 07/22/2025 | 15:19:40 | -69.99, 126.55 | 130.15 | 07/22/2025 | 15:18:54 | -70.01, 126.61 | 130.13 | 3.12 | 46 |
| 3 | 07/25/2025 | 05:55:13 | -70.42, -92.97 | 129.16 | 07/25/2025 | 05:56:25 | -70.29, -92.39 | 129.32 | 25.70 | 72 |
| 4 | 07/25/2025 | 06:45:52 | 70.05, 74.91 | 50.47 | 07/25/2025 | 06:45:54 | 70.07, 74.94 | 50.48 | 2.48 | 2 |
| 5 | 07/25/2025 | 07:36:34 | -69.95,-117.62 | 129.64 | 07/25/2025 | 07:35:24 | -69.97,-117.57 | 129.61 | 2.88 | 70 |
| 6 | 07/27/2025 | 22:12:03 | -70.11, 23.28 | 128.88 | 07/27/2025 | 22:12:58 | -70.12, 23.25 | 128.88 | 1.81 | 55 |
| 7 | 07/27/2025 | 23:02:47 | 70.02,-169.27 | 51.03 | 07/27/2025 | 23:02:25 | 70.01,-169.26 | 51.03 | 0.79 | 22 |
| 8 | 07/27/2025 | 23:53:15 | -69.16, -0.71 | 129.86 | 07/27/2025 | 23:52:07 | -69.25, -2.67 | 129.69 | 77.93 | 68 |
| 9 | 07/30/2025 | 14:28:59 | -70.12, 139.03 | 128.23 | 07/30/2025 | 14:29:28 | -70.11, 139.11 | 128.26 | 3.63 | 29 |
| 10 | 07/30/2025 | 15:19:42 | 69.98, -53.45 | 51.63 | 07/30/2025 | 15:18:55 | 69.99, -53.41 | 51.64 | 1.59 | 47 |
| 11 | 08/02/2025 | 05:55:15 | 70.37, 87.09 | 52.70 | 08/02/2025 | 05:56:26 | 70.28, 87.61 | 52.57 | 21.83 | 71 |
| 12 | 08/02/2025 | 06:45:53 | -70.03,-105.07 | 127.65 | 08/02/2025 | 06:45:59 | -70.02,-105.13 | 127.67 | 3.13 | 6 |
| 13 | 08/02/2025 | 07:36:37 | 69.95, 62.36 | 52.27 | 08/02/2025 | 07:35:25 | 69.95, 62.42 | 52.28 | 2.17 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/21/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/21/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9